In the 1930’s, four Chinese spies, Chuilang (Zhu Yawen), Lan (Liu Haocun), Zhang (Zhang Yi) and Yu (Quin Hailu) infiltrate Manchukuo, a puppet state of the Empire of Japan located in China. The Japanese had bombed an internment camp in Manchukuo to cover-up the existence of the camp. The four spies’ mission is to rescue a surviving prisoner who was held at an internment camp in hopes of exposing the truth around the world.
